Mortise gauge



Sept 12, 1933 L. T, LA PAUGH ET AL 1,926,904

MORTISE GAUGE v Original Filed Aug. 16, 1928 3 Sheets-Sheet lv H L@ MN* x l N f A JDS lo :t

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Ill Uuj INVENToRb LY L. T. LFI PHUGH E. SHEF! P Y 4 i Sept. 12, 1933.

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MORTISE GAUGE Original Filed Aug. 16, 1928 3 Sheets-Sheet 2 INVENTORS L. T. LH PFILIGH E. C. SHEH ATTORNEY sept. 12, 1933. L. T.

Origina LA PAUGH ET Al. 1,926,904

MORTISE GAUGE 1 Filed Aug. 16,-1928 3 Sheets-Sheet 3 7:1 E WZ.

INVENTORS l L. T. I FL PHLIEH E D. SHEH ATTORNEY Patented sept. i2, reas STATES i i,02t,004

r ermee I 1,926,904 MoRTisn GAUGE renier. La Paugh and Elizabeth o. shea, Oakland, Calif.

2 claims.- (o1.v 33 197) v This invention relates to improvements in gauges and has particular reference to a gauge for the fitting of hingeson both the door and the casing.

The principal object of this inventionfis t0 produce a tool whereby hinges may be accurately placed upon both the casing and the door without the necessity of first tting the door into the opening and then making marks upon the door and the casing as isnow the practice.

Another object is to produce a device wherein the cuts to produce the mortise is accomplished,

with the tool by simplystriking the head of the device and the adjacent parts.

A further object is to provide means whereby the clearance between the top and the bottom of the door is automatically provided for.

Other objects and advantagesv will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Figure I is a vertical cross section of our device,

Figure IIis a top plan View of ,Figure I taken throughthe line II--IIJ Y Y Y Y Figure III is a bottom plan view of Figure IVI, i

VFigure IV isV a fragmentary view of a door casing having ourV vdevice. applied thereto and showing the mannerY in which the same is employed,

Figure V is fragmentary view of a door showing our device applied thereto,

Figure VI is a fragmentary view on an enlarged scale showing our device aplied to va door casing,

Figure VII is a fragmentary View upon an enlarged scale taken at right angles to that of Figure VI,

Figure VIII is a detail perspective View of one of the pairs of guide blocks, and

Figure IX is a diagrammatic view showing the stop block in its two positions relative to a casing and a door.

In order to hang a door it is necessary that the door first be fitted to the opening after which it must be marked so that the hinges may be mortised to both door and casing. f

Referring to Figure I, the numeral 5 designates the body portion of our tool which is channel shaped and carries a slide 6 movable between the sides of the channel or guides 7 and 8 and slidably held by spring bands 9 and 1l. Recesses are shown at 12 in which one of the springv clips is adapted to come to rest so that the slide may be adjustably held in various positions. The body `bottom of the body 5, the guide block on the portion 5 is provided with a head 13 which carries a slidablecutter` 14 .having ahead 16 upon its upper extremity and a cutting edge 17 upon its lowervextremity. j

By. viewing Figure -II it will be noted that the lslidable `cutter 14 is of less width than the head 13 andthat pivoted to the head I3 are adjusting blocks 18 and 19 the purpose of which is to permit the head to be moved to either side as necessity requires. vThese blocks 18 and Y19 are of the shape as best shown in Figure VI and are pivotedon a cross rod -20 shown in dotted lines, best shown in Figure II. This permits the blocks to be swung upon the pivot so that when the block 18 is in the position shown in Figure II lthe block 19 will be in the position of this gure and thus the cutter will be held to one side of the device, but may be moved to the opposite sideof the device by swinging the block 18 to the same relative'position as-the `block 19 of Figure II, and by swinging the block 19 to Athe samerelative position as the block 18 of this gure. Mounted uponV the opposite sides vof the body portion:5 yare guide blocksI 21,722, 23 and 24, These guide blocks are of irregular shape so as` to accommodate for various uses of the tool, in that they canbe turned to act as stops for thetool when in its various positions.

By Yviewing Figure VIIIit will be noted that these guide ,blocksY areY connected together by `a pivot pin 26 with the result that when one guide block is rotated the other will be rotated in a similar manner. They are so arranged that when the guide `blocks on one side project below the opposite side will be flush with the bottom of the body 5. A plate 2'7 is secured to the end of the device and provides means whereby the slidable cutter may be removed and replaced at will.

The slide 6 carries a gauge plate 28 at its free end which gauge plate is secured to a rod 29 passing through a clamping device 31 which is actuated by the nut 32. This rod 29 travels over a scale 32 formed upon the bottom of the slide Gil' 6 see Figure VIII. A stop block is shown at 33 m0 and is pivotally secured to the body 5 the purpose of which will be later seen.

By referring to Figure VII, it will be noted that the slidable cutter is provided with outstanding lugs 34 and 38.. These lugs limit the downward movement of the cutter.

The manner of using our gauge is as follows:-

Assuming that the door has been iitted t0 the opening to which it is Ato placed, the same is removed.V The gauge is nowV employed, the slide un rcs 6 removed and the gauge placed against the casing as indicated in Figure IV. This will bring the stop 33 against the top of the casing, the stop at this time being in the position shown in Figure IXa. The guide blocks 22 and 24 are so turned that they overlie the edge of the casing. The adjusting blocks 18 or 19 are so arranged that the slidable cutter is moved toward the right side of the gauge as Viewed in Figure VII, after which a blow is struck upon the head 16. rThis drives the cutter downwardly until the lugs 34 and 36 strike the head 13. The cutter will have entered the wood ofthe casing at the point C, the correct depth for the hinged mortise. The gauge is now removed and the slider 6 inserted so that the plate 28 will occupy the, same place relative to the casing that the stop block 33 .pre-

viously occupied. By now striking a second blow the cutter will enter the casing at the point D in the same manner as before mentioned.

By new removing the'tool and employing` the same as illustrated in Figure VI, the back cut E may be made. By moving the tool between the points C and D, the entire back cut may be accomplished and then by moving the tool Vtoward the edge of the casing, a series of cuts may be made all to the proper depth of the mortise. It will now be a simple matter to use a chisel for cleaning out the mortise. The operation for cutting the mortise at the bottom of the door is substantially the same with the exception that the plate 28 may be moved away from the slide a suiiicient distance to provide for the clearance usually furnished at the bottom of the door.

This clearance is known and can be readily ascertained upon the scale 32'. The clearances are obtained by taking measurements from the inside of the plate for the second cut for the upper hinge G on the door and from the outside of the plate for the first and second cut on the casing at 17, where the thickness of the plate allows for the clearance of the door. It is to be noted that the plate 28 is moved away from the end of the slider 6 to allow for thickness of thresholds.

W hen using our device upon the door as shown in Figure V, in order to make the Vfirst out at the point F, the slider 6 is removed and the stop block 33 is rotated so as to assume the position of Figure IXb. The manner of placing the tool and making the cuts is the same as before described.

In making the cut G, the slider is again employed. The cuts at the bottom of the door are made in the same manner with the exception that the stop plate 28 is returned to its original position thus taking off 'the allowance made for the clearance and due to the shape of the plate the same will hook over the edge of the bottom of the door andthus automatically place the tool in the right position so that the cuts H and I may be made.

It will be noted that the body 5 is recessed near the head as at 17 and serves to act as a stop for the back cross cut E on the door or frame in combination with the guide blocks 21 and 22.

It is to be understood that the form of our invention herewith shown and described is to be taken as a preferred example of the same and that various changes relative to the material, size, shape and arrangements of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims. Y

Having thus described our invention, we claim:-

1, In a gauge of the character described, an elongated base member, a slide positioned for adjustment onand along said base member, guide blocks pivotally secured to the sides of said base member, a head formed at one end of said base member, a cutter mounted in said head for sliding movement transversely of said base and means for limiting the movement of said cutter, said means including lugs carried on said cutter and adapted to engage said head.

. 2. In a gauge of the character described, a base, spring bands carried by said base, a slider movable on said base and held in adjusted position by said spring bands, guide blocks pivotally secured to the sides of said base, a head formed on said base and positioned at one end thereof, a cutter mounted in said head Vfor sliding movement transversely of said base, lugs formed on said cutter and adapted to engage said head for the purpose of limiting the movement of said cutter and means for adjustably positioning said cutter with respect to the width of said head and a plate attached to said slider for the purpose specified.

Y LOUIE T. LA PAUGH. ELIZABETH C. SHEA. 

